Method for boiler repairs



Apm'al 9, 1940.

A. T. JOHANSON METHOD FOR BOILER REPAIRS Filed Jan. 11, 1939 2Sheets-Sheet l INVENTOR.

7 ATTORNEY.

A T. JOHANSON METHOD FOR BOILER REPAIRS 2 Sheets-Sheet 2 Filed Jan. 11,1939 1 N VENTOR. Zp/z iUofzez/vfion,

ATTORNEY.

April 9, 1940 Patented Apr. 9, 1940 UNIT ED' "STATES, PATENT OFFICEone-half to Milton E. Page, Jr., Chicago,' lll. Application January 11,1939,-Serial No. 250,272

My current invention pertains toan improved method and means forrepairing metallic boilers and similar structures, such, for example, asare commonly employed for heating purposes, a leading aim and primeobject of the invention being the provision ofa procedurewhich'facilitates and hastens the repair and yet'permits it to beaccomplished at relatively low cost.

Metallic boilers, which are usually located in the basements ofbuildings, are subject to serious damage by rust, not'so much by reasonof the ordinary use of the boiler, but because basements are likelytobecome flooded through rains, backing up of water throughdrains, etc.,and such 5 conditions rust out thelower' parts of the boiler,

requiring the installation of a new one or the proper and adequatereconditioning of the old one. i

The-present invention,'therefore, relates to a new and improved methodof repairing the lower or base portions of such damaged boilers.

This is accomplished according to the basic principles of this inventionby cuttingaway the injured rusted parts of the boiler, preferablyprogressively, and replacing the removed parts by new efficient ones,while the'boiler as a whole remains properly and adequately supported bythe remaining unremovedv parts and/or the new portions. 1

p The practice of my invention according to its present preferredprocedure is illustrated in the accompanying drawings forming a part ofthis specification and throughout the 'views of which like elements ormembers have been designated by the same reference numerals.

In the drawings: Figure 1 illustrates a metallic boiler in perspectiveand the dotted line thereon indicates the division between the lowerrusted section thereof 40 and'the upper eflicient portion of the boiler;

Figure 2 is a view indicating a part of the new procedure and shows inplan two of the new corner-members Figure 3 is an elevation of such acorner 3 Claims. (ores-457.4)

To accomplish this desired object, four cornerelements are made in themanufacturers plant at a cost relatively small as compared withattempting to construct them on the spot,

Each such sectional corner-element comprises a right-angle'outermetal-plate I I, a corresponding. inner right-angle plate l2 spacedinwardly away from such external plate I I a distance cor- "respondingto that of the boiler, a right-angle base-plate l3 Welded tothe lowermargins of 10 plates H and l2,,and staybolts l4, I4 fastening the platestogether at a suitable distance above the base-plate.

I The repair'is preferably, but not necessarily, made in the followingmanner. I I I One lower corner portion of the damaged boiler is cutaway, as by an acetylene-torch, and removed, and, while the boiler issupported by its remaining parts, one such corner-element of properdimensions is introduced into place as a substitute for the removedcorner-section, and the upper edges of both of its plates are welded tothe ,loweredges of the corresponding plates of the boiler v 1 Thereupon,another corner-section is removed \25 in similar manner and replaced bya like new corner-element, and then the remainder of the lower sectionof the boiler between the replaced corner-elements is cut away andremoved, where'- upon an outer .plate l5 of suitable length and 30height and having an inwardly-extended, lower marginal-flange I6 isintroduced into position and its top edge is welded to the lower edge ofthe outer, plate just above it, its upright edges are welded to the endsof the two-corner-elements, 5

and the ends of its flange are welded to the ends of the bottom-platesof the pair of corner-members.

Thereafter, acompanion inner plate I1 is 10- cated in place and itsedges welded to the flange 49 16, to the edges of the inner, bent platesI2, l2 of the two corner-members, and to the lower edge of theboiler-plate above it.

After this has been accomplished, another corner portion of the boileris cut away and taken out and a new one put in its place, these actionsoccurring while the boiler is supported in part by its damaged sectionsand partially by the already inserted, fitted and secured newparts,whereupon additional external and internal plates l5 and I! 50 areintroduced and Welded in place after the parts which they are to replacehave been eliminated, and so on until the boiler is completely repairedor reconditioned.

' As will be readily understood, the exactorder 2 t p g 2,196,464

or sequence in which the sections of the boiler are cut away and castaside and the new parts introduced and welded in place is of littleimportance' I and such operations are subject to change as occasion orpreference dictates, the important point being that the corner-membersare all 'pre-formed and fabricated and are not made on the spot, wherebysubstantial expense and material time is saved in repairing the boiler.

The instant invention, set forth in the appended claims, is subject tovarious changes and modifications without departure from the heart andessence of the invention and without the loss or sacrifice of any of itsmaterial benefits and advantages.

I claim: v p

1. In the process of repairing the lower hollow walls of damagedmetallic boilers, the steps of successively cutting away and removingdamaged sections of the lower portion of the boiler walls andreplacing'the same by new sections in a manner an-cl in any orderwhereby the :boiler remains supported in position partly by originalsections of the boiler walls and partially by new sections during atleast at portion of the repairing operation, the corner-sections of theboiler walls being replaced by premade open-top corner-members, each.comprising an external right-angle pl'ata'an inner right-angle platespaced inwardly from said external-plate, a bottom-plate secured to thelower margins of said external and inner plates, .said external :andinner plates above said bottom plate being fastened together inspacedapart relation by staybolts,wel ding the top edges of both of saidexternal and internal right-angle plates to the lower edges of thecorresponding I plates of the boiler, filling in the spaces between saidcorner-members by intervening outer and inner spaced-apart plates one ofwhich latter plates *has a flange, constituting the bottom of suchintervening portion, welding said flange to the other plate of saidintervening p rtion, weld-' ing the ends of said intervening outer andinner plates to the corresponding plates of the two adjacentcorner-members, welding the ends of said intervening flange totheends ofthe bottom plates of said two adjacent corner-members, and welding thetop edges-of said outer and inner intervening plates tothe lower edgesof the corresponding plates of the boiler, said steps of welding saidintervening portions being performed in any order. q

2. The process set forth in claim 1 in which said flange is aninwardly-extended flange on said outer intervening plate.

3. In the process of repairing the lower hollow walls of damagedmetallic boilers, the steps of successively cutting away and removingthe damagedsections of the lower portion of the boilerwalls andreplacing the same in succession by new sections in such manner and inany order that the boiler remains supported in position while undergoingthe repairs partly by original sections of the boiler-walls andpartially by new sections during at least a portion of the repairingoperation, each corner-section of the boilerwalls being replaced by apremade open-top corner-member, each comprising an external rightedgesof the corresponding plates of the boiler,

welding said flange of each intermediate-section to the other plate ofsaid section, welding together the ends of said external and internalrightangle plates :of each corner-section to the ends of the inner andouter plates of the next. adjacent intermediate-sections, weldingtogether the. ends of the bottom-plate of each cornersection and theends of the bottom flanges of the 1 next adjacent intermediate-sections,and welding 'thetop edges of said outer and inner plates of eachintermediate-section to the lower edges of the corresponding plates ofthe boiler, said'removal of damaged sections of the .boiler, theirreplacement by said corner-sections and intermediate-sections, and saidwelding operations being performed in any order consistent with thesupport of the boiler in its original position during .such operations.

ADOLPH T. JOHANSON.

